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. 2018 Nov 19;8:17042. doi: 10.1038/s41598-018-35425-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Overall structure of the orbicularis retaining ligament (ORL). (a) Three-dimensional (3D) morphology reconstructed from micro-computed tomography (mCT) image sections. (b) Modified Verhoeff Van Gieson staining (VG) image. (c) A merged immunofluorescence (IF) image (elastin, blue; collagen type I, green; actin, red). Arrowheads indicate a direct fibre from the periosteum (P) to the dermis (D). OOc, orbicularis oculi muscle. S, sagittal; M, medial; A, anterior. The 3D morphology of the ORL is also shown as a movie in Video S1. VG images of the medial, central and lateral portions of the ORL are shown in Fig. S1. Three individual IF images of elastin, collagen type I and actin are separately presented in Fig. S2.